Take the same cylinder heads, induction, exhaust cam etc from a low rpm, long stroke engine . And change the short block for a large bore, short stroke unit of IDENTICAL displacement. HP and torque will be identical along with slower piston speed. Why does a short stroke large bore engine get used in a high rpm application? The small bore engine does not have room for large valves and large dia ports to feed a engine making high HP. The small bore engine's small ports they choke off high rpm flow. The small bore engine since it can't breath at high rpms . It's equipped with a short duration cam which builds low end torque and further chokes off high rpm power. Compression is kept a little lower to limit compression pressure and detonation. The large bore, short stroke engine with the larger ports and valves which can provide flow a higher rpms. The engine is cammed with an longer duration cam and higher compression . Which makes higher mid range torque and top end power.
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Today's Featured Article - Chores - by Frank Young. The ceaseless passing of time! It is at once our friend and our enemy. It measures our progress and it makes us old. Like most features of our life, few things are all good or all bad, and most such judgments depend on our own perspective or viewpoint. In our particular hobby, we enjoy the nostalgic return to the days of our youth as we recreate many of the scenes that took place on the family farm that served as the stage for the first few acts of the play that is our live
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